monkey crash fix (#2034)

* monkey fix 🐒

* wrap saru_p clear in target_pc

* Clear monkey leader pointer on delete

---------

Co-authored-by: matthewdavidrichardanderson <matthewdavidrichardanderson@mfb.com>
Co-authored-by: Luke Street <luke@street.dev>

src/d/actor/d_a_npc_ks.cpp

@@ -6882,6 +6882,16 @@ static int daNpc_Ks_Delete(npc_ks_class* i_this) {
         i_this->model->stopZelAnime();
     }
 
+#if TARGET_PC
+    if (leader == i_this) {
+        leader = NULL;
+    }
+
+    if (saru_p[i_this->set_id] == i_this) {
+        saru_p[i_this->set_id] = NULL;
+    }
+#endif
+
     return 1;
 }